CN217301971U - Multi-coating composite steel pipe insulation structure - Google Patents
Multi-coating composite steel pipe insulation structure Download PDFInfo
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- CN217301971U CN217301971U CN202122965990.0U CN202122965990U CN217301971U CN 217301971 U CN217301971 U CN 217301971U CN 202122965990 U CN202122965990 U CN 202122965990U CN 217301971 U CN217301971 U CN 217301971U
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Abstract
The utility model relates to a multi-coating composite steel pipe insulation system. The main body of the composite steel pipe is formed by butting a carbon steel pipe and a lining composite steel pipe; the carbon steel pipe and the lining composite steel pipe are connected through a surfacing layer at one end, and a thermal aluminum spraying coating is arranged on the inner wall of the surfacing layer to the position of the surfacing layer at the end of the pipe; the inner lining composite steel pipe is characterized in that two ends of the inner lining composite steel pipe are respectively provided with a surfacing layer, the inner surface of the inner lining pipe is coated with an insulating coating, one end of the insulating coating covers the surfacing layers at the end part of the carbon steel pipe, and the other end of the insulating coating is coated on the boundary of the surfacing layers; the outer wall of the pipe section of the main body is wound by a 3PE heat shrinkable tape, and 150mm is reserved when the pipe section is wound to two ends. Adopt the utility model discloses the potential difference of dissimilar metal has effectively been reduced. The problem of the connection of compound steel pipe and carbon steel pipe is solved.
Description
Technical Field
The utility model relates to a connection structure of composite steel pipe and carbon steel pipe, especially a compound steel pipe insulation system of many coats.
Background
The lining and the inner-coated composite steel pipe can greatly prolong the service life of the pipeline in corrosive media, so the lining and the inner-coated composite steel pipe are more and more widely used in the links of ocean oil gas exploitation and transportation. However, the long-distance pipeline has not only composite steel pipes but also carbon steel pipes due to different temperatures of different areas. The carbon steel pipe part adopts carbon steel and corrosion inhibitor, the composite steel pipe is connected with the carbon steel pipe by lining or internally coated with stainless steel or nickel-based alloy, galvanic corrosion can be generated at the connecting part due to inconsistent potential difference, if the galvanic corrosion problem can not be solved, the use of the composite steel pipe is greatly reduced, and therefore, the development and research of the structure capable of reducing the connecting potential difference between dissimilar metals are very necessary.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a compound steel pipe insulation system of many coats, it mainly solves the problem that above-mentioned prior art exists, adopts the utility model discloses effectively reduced dissimilar metal's potential difference. The problem of the connection of compound steel pipe and carbon steel pipe is solved.
In order to solve the technical problem, the technical scheme of the utility model as follows:
the utility model provides a compound steel pipe insulation system of many coats, its main part is become its characterized in that through the butt joint by carbon steel pipe and the compound steel pipe of inside lining:
the carbon steel pipe and the lining composite steel pipe are connected through a surfacing layer at one end, and a thermal aluminum spraying coating is arranged on the inner wall of the surfacing layer to the position of the surfacing layer at the end of the pipe;
the inner lining composite steel pipe is characterized in that two ends of the inner lining composite steel pipe are respectively provided with a surfacing layer, the inner surface of the inner lining pipe is coated with an insulating coating, one end of the insulating coating covers the surfacing layers at the end part of the carbon steel pipe, and the other end of the insulating coating is coated on the boundary of the surfacing layers;
the outer wall of the pipe section of the main body is wound by a 3PE heat shrinkable tape, and 150mm is reserved when the pipe section is wound to two ends.
The multi-coating composite steel pipe insulation structure is characterized in that: and both one end of the carbon steel pipe and both ends of the lining composite steel pipe are provided with N06625 alloy surfacing layers with the thickness of more than or equal to 90 mm.
The multi-coating composite steel pipe insulation structure is characterized in that: the inner lining composite steel pipe is lined with stainless steel 316L or nickel base alloy N08825.
The multi-coating composite steel pipe insulation structure is characterized in that: the inner walls of the carbon steel pipe and the lining composite steel pipe are flush after being butted.
The multi-coating composite steel pipe insulation structure is characterized in that: and the carbon steel pipe and the lining composite steel pipe are all made of N06625 butt weld materials.
Compared with the prior art, the utility model has the advantages of as follows:
1. adopt the utility model discloses the structure, compound steel pipe part have the inside lining part can with other compound steel pipes effective butt joints, simultaneously, with the butt joint of carbon steel pipe behind the inner wall coating insulating coating, carbon steel pipe inner wall has heated hot spraying aluminium again, this kind of structure has reduced the corrosion rate of carbon steel pipe after carbon steel pipe and compound steel pipe butt joint, has prolonged the life of steel pipe.
2. Adopt the utility model discloses the structure, the outer wall is through the winding of 3PE heat shrink area, protects the steel pipe outer wall, prevents that the outer wall from corroding.
3. Adopt the utility model discloses the structure, carbon steel pipe adopt with the material build-up welding of compound steel pipe the same kind, belong to the same kind of material butt joint after the butt joint of two parts steel pipe, reduced the potential difference. Meanwhile, the welding process difficulty during construction is reduced.
4. Adopt the utility model discloses the structure, the carbon steel pipe with the compound steel pipe of inside lining docks the back inner wall parallel and level, and no step can effectively prevent the scratch to the inner wall coating when the steel pipe is managed clearly.
Drawings
Fig. 1 is a top view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1, the utility model discloses a multi-coating composite steel pipe insulation structure. As shown in the figure: the main body of the steel pipe is formed by butting a carbon steel pipe 5 and a lining composite steel pipe 6.
The carbon steel pipe 5 and the lining composite steel pipe 6 are connected through a surfacing layer at one end, and a thermal aluminum spraying coating 1 is arranged on the inner wall of the surfacing layer at the end of the pipe.
The composite steel pipe with the inner lining is characterized in that two ends of the composite steel pipe with the inner lining 6 are respectively provided with a surfacing layer, the inner surface of the lining pipe is coated with an insulating coating 3, one end of the insulating coating 3 covers the surfacing layers at the end part of the carbon steel pipe 5, and the other end of the insulating coating is coated on the boundary of the surfacing layers.
The outer wall of the pipe section of the main body is wound by a 3PE heat shrinkable tape 4, and 150mm is reserved when the pipe section is wound to two ends.
The utility model increases the internal corrosion allowance by thermally spraying the aluminum-zinc alloy on the inner wall of the negative carbon steel pipe, and coats the non-conductive coating on the surface of the inert metal such as stainless steel or nickel-based alloy, etc. to reduce the potential difference, thereby reducing the galvanic corrosion; the outer surface is coated with a 3PE coating to increase corrosion resistance, and the pipe end adopts a surfacing welding N06625 alloy to meet the requirements of corrosion resistance and nondestructive inspection.
The utility model discloses in, 5 one end of carbon steel pipe with 6 both ends of inside lining composite steel pipe all have the N06625 alloy surfacing layer that is more than or equal to 90 mm.
In the utility model discloses, the compound steel pipe of inside lining 6 can inside lining stainless steel 316L or nickel base alloy N08825.
The utility model discloses in, carbon steel pipe 5 with the 6 butt joint back inner wall parallel and levels of inside lining composite steel pipe.
The utility model discloses in, carbon steel pipe 5 with the 6 butt weld materials of inside lining composite steel pipe all adopt N06625.
In the utility model, the hot-spraying aluminum coating 1 consists of 15 percent of Zn and 85 percent of Al, and has the thickness of 450 to 600 mu m. The insulating coating 3 is a CP epoxy coating, the thickness is 750-850 mu m, and the adhesive force is more than or equal to 12 MPa.
Adopt the utility model discloses make a seabed with compound steel pipe insulation system of multicoating, include following step:
(1) manufacturing a carbon steel (X65) pipe section with the length of 0.5m, turning off a layer with the length of 90mm and the thickness of 3.2mm on the inner wall of one end, overlaying 3.0mm of N06625 at the position, and inspecting according to requirements after overlaying.
(2) A length of 3.5m composite pipe section of carbon steel (X65) liner 316L was made, the thickness of the liner being 3.0 mm.
(3) And (3) carrying out surface treatment on the inner wall of the carbon steel pipe section, thermally spraying a zinc-aluminum alloy coating, wherein the thickness is 450-600 microns, one end of the zinc-aluminum alloy coating is sprayed to a position 50mm away from the port, and the other end of the zinc-aluminum alloy coating is sprayed to a boundary between the carbon steel and N06625. And (5) after the thermal spraying is finished, carrying out inspection according to requirements.
(4) And butt welding the surfacing end of the carbon steel pipe section and one end of the composite pipe section to form an insulating pipe section with the length of 4m, welding by using a 625 welding wire, machining the inner wall of a welding seam after the welding seam is qualified, and requiring that the inner diameter of the welding seam is consistent with the inner diameter of the composite pipe.
(5) And (3) performing surface treatment on the outer wall of the insulating pipe section, coating an outer anticorrosive layer, wherein the outer anticorrosive layer adopts three layers of PP (polypropylene) heat-shrinkable belts, and the two ends of each PP heat-shrinkable belt are reserved for 150 mm.
(6) And (3) carrying out surface treatment on the inner wall of the composite pipe section, coating an insulating coating, wherein the total thickness of the coating is 0.8mm, the butt joint end is coated on the boundary of the carbon steel surfacing layer, and the other end is coated at a position 50mm away from the port.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a compound steel pipe insulation system of many coats, its main part comprises carbon steel pipe (5) and inside lining compound steel pipe (6) through the butt joint, its characterized in that:
a surfacing layer is arranged at one end of the carbon steel pipe (5) connected with the lining composite steel pipe (6), and a thermal aluminum spraying coating (1) is arranged on the inner wall of the surfacing layer to the position of the surfacing layer at the pipe end;
the inner lining composite steel pipe (6) is characterized in that both ends of the inner lining composite steel pipe are provided with surfacing layers, the inner surface of the inner lining pipe is coated with an insulating coating (3), one end of the insulating coating (3) covers the surfacing layers at the end part of the carbon steel pipe (5), and the other end of the insulating coating is coated on the boundary of the surfacing layers;
the outer wall of the pipe section of the main body is wound by a 3PE heat shrinkable tape (4) till two ends are respectively reserved with 150 mm.
2. The multi-coating composite steel pipe insulation structure of claim 1, wherein: and N06625 alloy surfacing layers with the thickness of more than or equal to 90mm are arranged at one end of the carbon steel pipe (5) and at two ends of the lining composite steel pipe (6).
3. The multi-coating composite steel pipe insulation structure of claim 1, wherein: the inner lining composite steel pipe (6) is lined with stainless steel 316L or nickel base alloy N08825.
4. The multi-coating composite steel pipe insulation structure according to claim 1, 2 or 3, wherein: the carbon steel pipe (5) and the lining composite steel pipe (6) are in flush with the inner wall after being butted.
5. The multi-coating composite steel pipe insulation structure according to claim 1, 2 or 3, wherein: and the butt welding materials of the carbon steel pipe (5) and the lining composite steel pipe (6) are all N06625.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122965990.0U CN217301971U (en) | 2021-11-30 | 2021-11-30 | Multi-coating composite steel pipe insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122965990.0U CN217301971U (en) | 2021-11-30 | 2021-11-30 | Multi-coating composite steel pipe insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217301971U true CN217301971U (en) | 2022-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122965990.0U Active CN217301971U (en) | 2021-11-30 | 2021-11-30 | Multi-coating composite steel pipe insulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217301971U (en) |
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2021
- 2021-11-30 CN CN202122965990.0U patent/CN217301971U/en active Active
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